大挠性多体卫星的自抗扰姿态控制系统设计

Design of the Active Disturbance Rejection Attitude Control System for Large Flexible Multi-body Satellite

研究了最近提出的非线性自抗扰控制器 (ADRC)在大挠性多体卫星姿态控制中的应用问题。提出了一种双闭环自抗扰姿态控制器 (ADRAC) ,并从鲁棒性、干扰抑制、动静态性能指标和振动抑制等方面与使用于某挠性卫星的传统PID控制器进行了比较。在考虑了反作用轮和敏感器的实际非线性和敏感器噪声的影响情况下进行了仿真 ,结果表明 ,双闭环自抗扰姿态控制器各方面性能均优于传统的PID。本文提出的自抗扰姿态控制器 ,对实现挠性多体卫星的高精度高稳定度姿态控制 。

The recently developed nonlinear active disturbance rejection controller (ADRC) is applied to attitude control of large flexible multi-body satellite with reaction wheels. A nonlinear active disturbance rejection attitude controller (ADRAC) with double closed-loop is proposed for the satellite. For comparison purpose, a classic PID controller, which is actually used in certain flexible satellite is considered. Then a comparison is made between the ADRAC and the PID controller in terms of robustness, disturbance attenuation, dynamical and steady performance specification and vibration suppression. Considering the effects of the realistic nonlinearities in the reaction wheels and sensors and the noises of sensors, the simulations showed that the ADRAC significantly outperforms the PID. The proposed ADRAC is valuable for the attitude control of high accuracy and high stability for flexible multi-body satellite in practical applications.